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9b137d54d3
(See http://stackoverflow.com/questions/28558683/modeling-constraints-in-z3-and-unsat-core-cases) Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
/*++
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Copyright (c) 2012 Microsoft Corporation
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Module Name:
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solver_na2as.h
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Abstract:
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Solver that implements "named" assertions using assumptions (aka answer literals).
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That is, a named assertion assert_expr(t, a) is mapped into
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a implies t
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and 'a' is used as an extra assumption for check_sat.
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Author:
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Leonardo (leonardo) 2012-11-02
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Notes:
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--*/
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#ifndef _SOLVER_NA2AS_H_
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#define _SOLVER_NA2AS_H_
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#include"solver.h"
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class solver_na2as : public solver {
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ast_manager & m_manager;
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ptr_vector<expr> m_assumptions;
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unsigned_vector m_scopes;
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void restore_assumptions(unsigned old_sz);
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public:
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solver_na2as(ast_manager & m);
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virtual ~solver_na2as();
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virtual void assert_expr(expr * t, expr * a);
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virtual void assert_expr(expr * t) = 0;
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// Subclasses of solver_na2as should redefine the following *_core methods instead of these ones.
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virtual lbool check_sat(unsigned num_assumptions, expr * const * assumptions);
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virtual void push();
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virtual void pop(unsigned n);
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virtual unsigned get_scope_level() const;
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virtual unsigned get_num_assumptions() const { return m_assumptions.size(); }
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virtual expr * get_assumption(unsigned idx) const { return m_assumptions[idx]; }
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protected:
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virtual lbool check_sat_core(unsigned num_assumptions, expr * const * assumptions) = 0;
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virtual void push_core() = 0;
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virtual void pop_core(unsigned n) = 0;
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};
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#endif
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